{"id":"psathyrostachys-juncea","license":"CC-BY-4.0","data":{"scientificName":"Psathrostachys juncea","commonNames":["Russian Wildrye"],"taxonRank":"species","acceptedName":"Psathyrostachys juncea","family":"Poaceae","ids":{"usdaSymbol":"PSJU3","gbifKey":2705042},"usdaZoneMin":"3a","zoneSource":"usda-plants","states":["AK","AZ","CO","MN","MT","ND","NE","NM","SD","TX","UT","WA","WY"],"invasiveIn":[{"state":"AK","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["AK"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-AK-Plantae10028","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-09T00:00:00.000Z","sourceTaxon":{"name":"Psathyrostachys juncea","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021dxc), https://plants.usda.gov/home/plantProfile?symbol=PSJU3"],"taxonProjection":{"basis":"accepted-name","notes":"exact source identifier, rank, family, and scientific/accepted name"}},{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae10029","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-09T00:00:00.000Z","sourceTaxon":{"name":"Psathyrostachys juncea","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021dxc), https://plants.usda.gov/home/plantProfile?symbol=PSJU3"],"taxonProjection":{"basis":"accepted-name","notes":"exact source identifier, rank, family, and scientific/accepted name"}}],"hardinessAssertions":[{"minimum":"3a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-38,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PSJU3","sourceTaxon":"Psathrostachys juncea","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 25152, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"grass","matureHeightFt":3,"waterNeed":"low","evidence":[{"source":"nrcs-tn66-fuel-breaks-2016","verdict":"recommend","verdictRaw":"Common plant material options for greenstrips.","claims":"Appendix B row: Russian Wildrye (Psathrostachys juncea). Origin: Introduced; lifeform: Bunchgrass; relative height: Tall; seedling vigor: Low; longevity: Long. Precipitation zone: 8-12 in; soil texture: fine and medium; seeds/lb: 170,000; single-species drill seeding rate: 6 lb/ac; seeding depth: 0-1/4 in. Recommended releases: Bozoisky II, Bozoisky Select. The table prints “Psathrostachys”; the exact accepted GBIF spelling is “Psathyrostachys juncea” (GBIF key 2705042).","sourcePlacement":{"value":"common plant material option for a managed greenstrip in sagebrush ecosystems","scheme":"nrcs-tn66-greenstrip"},"edition":"Plant Materials Technical Note 66","url":"https://www.wlfw.org/wp-content/uploads/2016/03/tn66_fuel_breaks.pdf","documentDate":"2016-03-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"unr-fs-97-36-greenstrips","verdict":"recommend","verdictRaw":"Common perennial plants used in greenstrips and selected characteristics important to their establishment and use","claims":"Table 1 row: Russian Wildrye (Psathyrostachys juncea). Minimum yearly precipitation: 10-12 inches; salt or alkali tolerance: Moderate / High; status: I; growth form, flower color, or season: Bunch; varieties: ‘Bozoiski Select’, ‘Vinall’. The fact sheet says greenstrips should be grazed or mown frequently enough to reduce fuel buildup; otherwise their effectiveness is reduced dramatically.","sourcePlacement":{"value":"common perennial plant used in a maintained northern Nevada greenstrip","scheme":"unr-fs-97-36-greenstrip"},"edition":"Fact Sheet 97-36","url":"https://naes.agnt.unr.edu/PMS/Pubs/2020-3342.pdf","documentDate":"1997-01-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"}],"flammabilityClass":"fire-resistant","ratingReason":"limited-evidence","recommendation":"on-list","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-25T00:00:00.000Z","reviewNotes":"The table prints “Psathrostachys”; the exact accepted GBIF spelling is “Psathyrostachys juncea” (GBIF key 2705042)."},"localAssessmentInputs":{"stateDistribution":["AK","AZ","CO","MN","MT","ND","NE","NM","SD","TX","UT","WA","WY"],"nativeStates":[],"rangeAssertions":[{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["AK","AZ","CO","MN","MT","ND","NE","NM","SD","TX","UT","WA","WY"]},"provenance":"legacy-field"}],"usdaZoneMin":"3a","usdaZoneMax":null,"hardinessAssertions":[{"minimum":"3a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-38,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PSJU3","sourceTaxon":"Psathrostachys juncea","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 25152, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}],"hardinessSelection":{"status":"selected","assertion":{"minimum":"3a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-38,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PSJU3","sourceTaxon":"Psathrostachys juncea","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 25152, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},"assertions":[{"minimum":"3a","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-38,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PSJU3","sourceTaxon":"Psathrostachys juncea","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 25152, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}]},"invasiveIn":[{"state":"AK","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["AK"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-AK-Plantae10028","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-09T00:00:00.000Z","sourceTaxon":{"name":"Psathyrostachys juncea","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021dxc), https://plants.usda.gov/home/plantProfile?symbol=PSJU3"],"taxonProjection":{"basis":"accepted-name","notes":"exact source identifier, rank, family, and scientific/accepted name"},"provenance":"cited"},{"status":"widespread-invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae10029","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2022-05-09T00:00:00.000Z","sourceTaxon":{"name":"Psathyrostachys juncea","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"E","label":"widespread invasive (category E)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021dxc), https://plants.usda.gov/home/plantProfile?symbol=PSJU3"],"taxonProjection":{"basis":"accepted-name","notes":"exact source identifier, rank, family, and scientific/accepted name"},"provenance":"cited"}],"fireEvidenceClass":"fire-resistant","recommendation":"on-list","fireSourceScopes":[],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[{"state":"AK","status":"invasive-reported","source":"us-riis-v2"},{"state":"L48","status":"invasive-reported","source":"us-riis-v2"}],"usdaZoneMin":"3a"},"localAssessmentContract":"Compare each dimension separately. State noxious-weed seed designations are material-scoped and never become non-seed plant restrictions, ecological-invasive findings, nursery restrictions, alternatives, product evidence, or fire votes. Introduced/established context is not an invasive warning. Minimum-only hardiness has no inferred maximum; canonical source-temperature conversion is validated and contradictory applicable rows project no primary zone. L48 context applies only to conterminous states and is never exact-state status. Fire-performance conditions are not maintenance advice. FEIS fire-ecology context does not vote in the plant classification. Absence of a status row is not regulatory clearance."}